Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 12, 2020
Cover [Abstract]
Entity Registrant Name	Intellicheck, Inc.
Entity Central Index Key	0001040896
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2020
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business Flag	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		18,409,728
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2020